Please add a x-maintenance-intent to your opam files

[hannesm]

Hi,

at the opam-repository we try to archive packages that are not maintained and are not used. This is opt-in, so we would appreciate if you can specify the maintenance intention of your opam packages. This is as easy as specifying x-maintenance-intent in your opam file. A good value is [ "(latest)" ], which specifies that the most recent release is maintained, and should be kept in the opam-repository.

If you have further questions, please take a look at https://discuss.ocaml.org/t/opam-repository-archive-clarification-of-the-opam-fields or ask in this issue. Thanks a lot.